package com.iyunsir.lesson04;


import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

// 主窗口
public class DialogDemo extends JFrame {

    public DialogDemo(){
        this.setVisible(true);
        this.setSize(700,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        //JFrame 放东西，容器
        Container container = this.getContentPane();
        //绝对布局
        container.setLayout(null);

        //按钮
        JButton button = new JButton("点击弹出一个对话框"); //创建
        button.setBounds(30,30,200,50);

        // 点击这个按钮的时候,弹出一个弹窗
        button.addActionListener(new ActionListener() { // 监听器
            @Override
            public void actionPerformed(ActionEvent e) {
                // 弹窗
                new MyDialogDemo();
            }
        });


        container.add(button);


    }
    public static void main(String[] args) {
        new DialogDemo();

    }
    class MyDialogDemo extends JDialog{
        public MyDialogDemo(){
            this.setVisible(true);
            this.setBounds(100,100,500,500);

            // this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); 弹窗默认有关闭，不用写，不然会报错
            Container container = this.getContentPane();
            container.setLayout(null);

            container.add(new Label("云老师带你学Java"));



        }

    }

}


